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作 者 ：张 浩,雷赵民,窦学诚,路 标,李 强.

期 刊 ：中国生态农业学报 2008年 16卷 5期 页码：1298-1301

关键词：沼渣；沼渣源配合饲料；猪肉；营养价值；重金属残留；

Keywords:Biogas residue, Compound feed with biogas residue, Pork, Nutritive value, Heavy metal residue,

摘 要 ：对牛粪、玉米秸秆作为发酵原料生产沼气的发酵残留物——沼渣的营养价值及沼渣源配合饲料和沼渣源配合饲料生产的猪肉的重金属残留进行了分析。结果表明，风干沼渣中干物质、粗蛋白、粗脂肪、粗灰分、粗纤维含量分别为857.7 mg·g^-1、99.0 mg·g^-1、34.9 mg·g^-1、10.7 mg·g^-1、252.7 mg·g^-1；重金属元素镉、铅、铜含量分别为18.48 μg·kg^-1、42.50 μg·kg^-1、20.80 μg·kg^-1，汞未检出。对照组、沼渣Ⅰ组、沼渣Ⅱ组饲料中镉、铅、铜、汞的含量均低于国家饲料卫生标准；猪肉中重金属镉、铅、铜含量对照组、沼渣Ⅰ组、沼渣Ⅱ组分别为0.033 mg·kg^-1、0.044 mg·kg^-1、0.058 mg·kg^-1，0.268 mg·kg^-1、0.364 mg·kg^-1、0.393 mg·kg^-1，5.555 mg·kg^-1、7.180 mg·kg^-1、8.404 mg·kg^-1，汞均未检出。沼渣作为猪饲料源利用有一定的潜力，以2%~10%在饲料中添加不会引起猪肉重金属镉、铅、铜、汞含量超标。

Abstract:Nutrient content of biogas residue from fermentation of cattle manure and corn stalk for biogas along with the heavy metal content of compound feedstuff with biogas residues and the pork fed on it were analyzed. Results show that dry-matter, crude protein, crude fat, crude ash and crude fiber contents of biogas residue are 857.7 mg·g^-1, 99.0 mg·g^-1, 34.9 mg·g^-1, 10.7 mg·g^-1 and 252.7 mg·g^-1 respectively. Cadmium, lead and copper contents are respectively 18.48 μg·kg^-1, 42.50 μg·kg^-1 and 20.80 μg·kg^-1; with no mercury detected. Animal feeds without biogas residue (the control treatment), biogas residue I and biogas residue II, contain lower amounts of cadmium, lead and copper than the stipulated national health standards. The contents of cadmium, lead and copper in pork fed on control foodstuff, biogas residue I and biogas residue II are 0.033 mg·kg^-1, 0.044 mg·kg^-1 and 0.058 mg·kg^-1; 0.268 mg·kg^-1, 0.364 mg·kg^-1 and 0.393 mg·kg^-1; and 5.555 mg·kg^-1, 7.180 mg·kg^-1 and 8.404 mg·kg^-1 respectively. No mercury is detected in pork product. Biogas residue is a potential additive to pig feed, and addition proportion of 2%~10% does not push heavy metal content above stipulated health standards for pork.

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